Transmission line high-Tc dc-SQUIDs

被引：4
|
作者：
Kuriki, S [1 ]
Oyama, H
Maruyama, E
Hayashi, A
Hirano, S
Suzuki, D
Koyanagi, M
机构：
[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 060, Japan
[2] Electrotech Lab, Tsukuba, Ibaraki 305, Japan
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1999年 / 9卷 / 02期
关键词：
D O I：
10.1109/77.783728
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Because of high permittivity of SrTiO3 (STO) substrate, YBCO high-T-c SQUIDs hale distributed impedance. Based on the simulation by the analytical method to calculate the I-V characteristic, we have designed and fabricated YBCO de SQUIDs that have a transmission-line-like geometry of thin parallel strips with a wide slit between them. The geometrical parameters were determined to give high modulation voltage. The fabricated SQUIDs had a white noise of (0.5-1.0)X10(-5) Phi(0)/Hz(1/2). We also designed a direct coupling magnetometer, in which the transmission line SQUID was located within the hole of the pickup coil. On a small substrate area of 5 mm X 10 mm, the fabricated magnetometer had an effective area of 0.22 mm(2). The field noise of about 100 fT/Hz(1/2) was obtained in the white noise region.
引用
收藏
页码：3275 / 3278
页数：4
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